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  <title>Searches for all elements with given local tag name</title>
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  <div id="layout-content"><div id="domdocument.getelementsbytagname" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">DOMDocument::getElementsByTagName</h1>
  <p class="verinfo">(PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">DOMDocument::getElementsByTagName</span> &mdash; <span class="dc-title">Searches for all elements with given local tag name</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-domdocument.getelementsbytagname-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="methodname"><strong>DOMDocument::getElementsByTagName</strong></span>(<span class="methodparam"><span class="type">string</span> <code class="parameter">$qualifiedName</code></span>): <span class="type"><a href="class.domnodelist.html" class="type DOMNodeList">DOMNodeList</a></span></div>

  <p class="para rdfs-comment">
   This function returns a new instance of class
   <span class="classname"><a href="class.domnodelist.html" class="classname">DOMNodeList</a></span> containing all the elements with a given
   local tag name.
  </p>
 </div>

 <div class="refsect1 parameters" id="refsect1-domdocument.getelementsbytagname-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">qualifiedName</code></dt>

     <dd>

      <p class="para">
       The local name (without namespace) of the tag to match on. The special value <code class="literal">*</code>
       matches all tags. 
      </p>
     </dd>

    
   </dl>

  </p>
 </div>

 <div class="refsect1 returnvalues" id="refsect1-domdocument.getelementsbytagname-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   A new <span class="classname"><a href="class.domnodelist.html" class="classname">DOMNodeList</a></span> object containing all the matched 
   elements.
  </p>
 </div>

 <div class="refsect1 examples" id="refsect1-domdocument.getelementsbytagname-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="domdocument.getelementsbytagname.example.basic">
    <p><strong>示例 #1 Basic Usage Example</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$xml&nbsp;</span><span style="color: #007700">=&nbsp;&lt;&lt;&lt;&nbsp;XML<br /></span><span style="color: #DD0000">&lt;?xml&nbsp;version="1.0"&nbsp;encoding="utf-8"?&gt;<br />&lt;books&gt;<br />&nbsp;&lt;book&gt;Patterns&nbsp;of&nbsp;Enterprise&nbsp;Application&nbsp;Architecture&lt;/book&gt;<br />&nbsp;&lt;book&gt;Design&nbsp;Patterns:&nbsp;Elements&nbsp;of&nbsp;Reusable&nbsp;Software&nbsp;Design&lt;/book&gt;<br />&nbsp;&lt;book&gt;Clean&nbsp;Code&lt;/book&gt;<br />&lt;/books&gt;<br /></span><span style="color: #007700">XML;<br /><br /></span><span style="color: #0000BB">$dom&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">DOMDocument</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$dom</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">loadXML</span><span style="color: #007700">(</span><span style="color: #0000BB">$xml</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$books&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">$dom</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">getElementsByTagName</span><span style="color: #007700">(</span><span style="color: #DD0000">'book'</span><span style="color: #007700">);<br />foreach&nbsp;(</span><span style="color: #0000BB">$books&nbsp;</span><span style="color: #007700">as&nbsp;</span><span style="color: #0000BB">$book</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #0000BB">$book</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">nodeValue</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
Patterns of Enterprise Application Architecture
Design Patterns: Elements of Reusable Software Design
Clean Code
</pre></div>
    </div>
   </div>
  </p>
 </div>

 <div class="refsect1 seealso" id="refsect1-domdocument.getelementsbytagname-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="methodname"><a href="domdocument.getelementsbytagnamens.html" class="methodname" rel="rdfs-seeAlso">DOMDocument::getElementsByTagNameNS()</a> - Searches for all elements with given tag name in specified namespace</span></li>
   </ul>
  </p>
 </div>

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